Revenue Recognition - Summary of Company's Revenue Streams (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
NONINTEREST INCOME
Loan servicing fees									$ 1,840	$ 1,445	$ 787
Earnings on bank-owned life insurance									3,486	3,427	2,279
Net gain from sales of loans									6,642	10,759	12,468
Net gain from sales of investment securities									8,571	1,399	2,737
Other income									4,486	3,641	5,680
Total noninterest income	$ 9,801	$ 11,430	$ 6,324	$ 7,681	$ 6,970	$ 8,240	$ 8,151	$ 7,666	35,236	31,027	31,114
Service charges on deposit accounts
NONINTEREST INCOME
Noninterest income									5,769	5,128	3,273
Other service fee income
NONINTEREST INCOME
Noninterest income									1,438	902	1,847
Debit card interchange income
NONINTEREST INCOME
Noninterest income									3,004	4,326	2,043
Within Scope
NONINTEREST INCOME
Other income									1,015	1,242	491
Total noninterest income									11,226	11,598	7,654
Within Scope | Service charges on deposit accounts
NONINTEREST INCOME
Noninterest income									5,769	5,128	3,273
Within Scope | Other service fee income
NONINTEREST INCOME
Noninterest income									1,438	902	1,847
Within Scope | Debit card interchange income
NONINTEREST INCOME
Noninterest income									3,004	4,326	2,043
Out of Scope
NONINTEREST INCOME
Loan servicing fees									1,840	1,445	787
Earnings on bank-owned life insurance									3,486	3,427	2,279
Net gain from sales of loans									6,642	10,759	12,468
Net gain from sales of investment securities									8,571	1,399	2,737
Other income									3,471	2,399	5,189
Total noninterest income									$ 24,010	$ 19,429	$ 23,460